* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body, html {
  height: 100%;
  font-family: "Tahoma", sans-serif;
  direction: rtl;
}

.video-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1;
}

#bg-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: white;
  padding: 20px;
  margin-top: 15%;
}

.logo {
  max-width: 200px;
  margin-bottom: 20px;
}

h1 {
  font-size: 3rem;
  margin-bottom: 10px;
}

.subtitle {
  font-size: 1.5rem;
  color: #f1f1f1;
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8); /* نیمه‌شفاف */
  z-index: 0;
}

@media screen and (max-width: 768px) {
  .logo {
    max-width: 120px;
  }

  h1 {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 1rem;
    padding: 0 10px;
  }

  .content {
    margin-top: 30%;
    padding: 10px;
  }
}